With a nice baseline established, it was time to really improve the car's suspension and see what this chassis can do. We started by adding the STi pillowball rear control arms, which replace the factory rubber bushings with sealed spherical bearings.

Whiteline was kind enough to send us a big box full of bushings. We installed the following:

All of these suspension bushings were a vast improvement over the factory rubber bushings. Turn-in was more precise and it was much easier to feel what the car was doing mid corner. With a minimal increase in NVH, these mods are almost a no brainer for anyone looking to improve their BRZ or FR-S's handling for a reasonable cost.